The screen flashing issue that occurs when tapping the home, back, or menu buttons while using Chrome on the POCO C71 is a known problem related to the Google Chrome browser itself.
For your reference, here are more details of the issue:
1. This issue has already been reported to Google, and they have acknowledged it. According to Google's response;
2. The problem has been resolved in Chrome version 135.0.7009.0, and they have confirmed that it can no longer be reproduced in that version. However, this updated version has not yet been officially released. Once the new Chrome version becomes available through a Google app update, the issue will be addressed;
3. Please stay tuned for future updates to Google applications and update Chrome promptly when notified.